diff --git a/main.go b/main.go
index 44151672ce0cf2f1be70eab7860aba2cfce5c9bc..d5490caf9410a34d833a152fff2ed66785effcb2 100644
--- a/main.go
+++ b/main.go
@@ -297,6 +297,9 @@ type Result interface {
 	// Discards the initial filtering conditions and sets new ones.
 	Where(...interface{}) Result
 
+	// Groups results using a key.
+	Group(...interface{}) Result
+
 	// Removes all items within the result set.
 	Remove() error